Algebraic Thinking: Patterns and Equations · Weeks 19-27

Representing Word Problems with Equations

Students represent word problems using drawings and equations with a symbol for the unknown number.

Key Questions

  1. Explain how a drawing can help visualize the relationships in a word problem.
  2. Construct an equation that accurately reflects the actions described in a word problem.
  3. Critique an equation that does not correctly represent the unknown in a problem.

Common Core State Standards

CCSS.Math.Content.2.OA.A.1
Grade: 2nd Grade
Subject: Mathematics
Unit: Algebraic Thinking: Patterns and Equations
Period: Weeks 19-27

Suggested Methodologies

RAFT Writing

Creative writing from a specific Role, Audience, Format, Topic

25–45 min

Learn more about RAFT Writing

Concept Mapping

Build visual maps of concept relationships

20–40 min

Learn more about Concept Mapping

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5E Model

The 5E Model structures lessons through five phases (Engage, Explore, Explain, Elaborate, and Evaluate), guiding students from curiosity to deep understanding through inquiry-based learning.

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Plan a multi-week math unit with conceptual coherence: from building number sense and procedural fluency to applying skills in context and developing mathematical reasoning across a connected sequence of lessons.

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More in Algebraic Thinking: Patterns and Equations

Identifying Even and Odd Numbers

Investigating the properties of numbers that can be divided into two equal groups or pairs.

2 methodologies

Writing Equations for Even and Odd

Students write an equation to express an even number as a sum of two equal addends.

2 methodologies

Understanding Repeated Addition with Arrays

Using rectangular arrays with up to 5 rows and 5 columns to understand repeated addition.

2 methodologies

Solving One-Step Word Problems

Mastering one-step word problems involving situations of adding to, taking from, putting together, taking apart, and comparing, with unknowns in all positions.

3 methodologies

Solving Two-Step Word Problems

Students solve two-step word problems involving addition and subtraction within 100.

2 methodologies

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